Shears.



O. VON DEN STEINEN.

SHBARS.

APPLICATION FILED AUG. 19, 1910.

1,048,753. Patented Dec. 31, 1912.

WITNESSES: INYENTOR ea m w M M i OTTO VON DEN STEINEN, 0F NEWARK, NEWJERSEY.

SHEARS.

Specification of Letters Patent.

Patented Dec. 31, 1912.

Application filed August 19, 1910. Serial No. 578,028.

To all whom it may concern:

Be it known that I, Orro VON DEN STEINEN, a citizen of the UnitedStates, residing at Newark, in the county of Essex and State of NewJersey, have invented certain new and useful Improvements .in Shears;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to figures of reference markedthereon, which form a part of this specification.

This invention relates to shears or scissors which are constructed tohave the blades and the handles of the usual type, but so connected thatwhen the scissors or shears are opened or closed, the blades, in

addition to having a pivotal or swinging relation to each other, alsohave a longitudinal movement so that a draw out or a better shearingaction is the result.

The invention further provides shears of this kind in which the pressureon the point, that is, on the end of the blades, can be adjusted so asto insure contact of the blades at their points without making an excessspace or distance between the blades intermediate of their ends.

The invention is further designed to provide a pivotal connectionbetween the blades in which the outward limit or movement, that is, themovement when the blades are being separated, is not governed by thepivotal connection, in other words, that the blades can be swung as farapart as necessary so that the action of the blades, as to the extent oftheir swing, is no different from any ordinary shears.

The invention is illustrated in the accompanying drawing, in whichFigure 1 is an elevation of my improved shears. Fig, 2 is an enlargedsection through line 2, 2, in Fig. 1. Fig. 3 is an enlarged sectionthrough line 3, 3, in Fig. 1, and Fig. 4 is a perspective view of one ofthe blades showing a groove and slot for causing the movement of theblades when they are operated. Fig. 5 is an enlarged section takenlongitudinally through the slot 17 in Fig. 4.

The blades 10 and 11 are made as usual, having the respective handles 12and 13. The blade 11 has a bolt 14 passing through it, said bolt alsopassing through the slot 15 in the blade 10. The slot 15 is curved andis disposed so that the end 16, which is engaged by the bolt 14 when theblades are in the open positions, is tangential to the longitudinalaxis, that is, the cutting edge of the blade. To insure the longitudinalmovements of the blades on each other, the blade 10 is provided with acurved groove 17 which is concentric with the slot 15 and receives ascrew 18 which is secured in the blade 11. The screw 18 is adjustable inthe blade 11, and the pressure on the blade 10 can be regulated by thescrew so that with the head 19 of the bolt 14 acting as a fulcrum, theends 21 of the blades can be brought together to insure cutting for theentire length of the blades. The groove 17 is made deeper at its openend and shallower at its inner end 22 as shown in Fig. 5 of the drawingso that the pressure on the blades increases when the shears are nearlyshut. The groove 17 is preferably made with a flaring end 23 to receiveand guide the screw 18 when the blades are being brought together afterthey are forced far enough apart to permit the screw to leave thegroove. The inner end of the groove 17 cooperates with the screw 18 tolimit the closing movement of the blades. The curved slot and curvedgroove arranged concentrically, that is, with the same center, give arotary or circular swinging motion to the blades resulting in a goodcutting motion when the blades are operated.

I have illustrated the groove and the slot in one blade, and the boltand screw secured in the other blade, but it will be understood thatthis disposition of these elements can be changed without departing fromthe scope of my invention.

Having thus described my invention, what I claim is 1. An improvedshears comprising a pair of blades having suitable handles thereon, abolt secured to one of the blades and on which the second blade isadapted to swing, the second blade having a curved groove extendinginward from one edge, and a screw in the first-mentioned blade, saidscrew having its end projecting into the groove to exert a variablepressur'e thereon and also acting to guide the grooved blade, said screwpassing from the groove when the blades are swung wide apart.

2. An improved shears comprising a pair of blades having suitablehandles thereon, a

bolt secured to one blade and on which the second blade is adapted toswing, the second blade having a curved slot and arranged to swing onthe bolt, the second blade having a curved groove extending inward fromone edge and having its open end flared, said groove decreasing in depthtoward its inner end, and a screw in the first-mentioned blade arrangedto enter the groove to guide the grooved blade and also being adjustableto exert various pressures on the bottom of the groove, the open-endedgroove permitting the passing of the screw from the groove when theblades are swung wide apart, the slot and the groove being sub- 15stantially concentric.

In testimony, that I claim the foregoing, I have hereunto set my handthis 13th day of August 1910.

OTTO VON DEN STEINEN.

Witnesses:

EDWARD F. BYRNE, WM. H. OAMFIELD.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

